The deal is contingent on Boston passing a physical in Miami. The Dolphins tentatively plan to announce the trade Wednesday.
Smith said the player to be named won't be high-profile.
The teams completed the trade following six days of negotiations after Boston accepted a restructured contract. He was guaranteed $6.9 million over the next two seasons under terms of the seven-year deal he signed last March before falling out of favor in San Diego.
Smith declined to discuss details of the restructured deal. Boston's agent didn't return calls seeking comment.
Boston caught 70 passes for 880 yards and seven scores in his only season with the Chargers. Teammates criticized his work ethic, and he was suspended for one game following an argument with a coach.
|David Boston will try to get his career back on the Pro Bowl-track with the Dolphins.(AP)|
In Miami, Boston will be reunited with receivers coach Jerry Sullivan, who helped him reach the Pro Bowl in 2001 when both were with Arizona.
Boston caught 98 passes for 1,598 yards that year. The former Ohio State star was the eighth player taken in the 1999 draft.
The Dolphins were eager to upgrade their receiving corps. Acquiring Boston will allow the team to focus elsewhere -- perhaps the offensive line -- in the first round of next month's draft.
Boston could also provide an appealing target for A.J. Feeley, acquired two weeks ago from Philadelphia to compete with Jay Fiedler for the quarterback job.
Last season the Dolphins ranked 26th in the NFL in passing.
The Associated Press News Service
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